Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended				9 Months Ended		12 Months Ended
	Sep. 30, 2025	Mar. 31, 2025	Sep. 30, 2024	Mar. 31, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Cash flows from operating activities:
Net earnings	$ 1,639	$ 29	$ (93)	$ 1,879	$ 2,267	$ 3,541
Adjustments to reconcile net earnings to net cash provided (used) by operating activities:
Change in receivables and advance premiums					(28)	28
Capitalization of deferred policy acquisition costs					(796)	(767)
Amortization of deferred policy acquisition costs	218		214		655	638	$ 851
Increase in policy liabilities					(732)	(259)
Change in income tax liabilities					92	(64)
Net investment (gains) losses	(275)		1,408		1,109	(239)
Other, net					(327)	(504)
Net cash provided (used) by operating activities					2,240	2,374
Proceeds from investments sold or matured:
Available-for-sale fixed maturity securities					9,566	4,832
Equity securities					355	702
Held-to-maturity fixed maturity securities					2	2
Commercial mortgage and other loans					1,421	1,482
Costs of investments acquired:
Available-for-sale fixed maturity securities					(10,760)	(4,589)
Equity securities					(369)	(333)
Commercial mortgage and other loans					(1,068)	(937)
Other investments, net					(1,109)	(2,682)
Settlement of derivatives, net					13	(92)
Cash received (pledged or returned) as collateral, net					3,375	2,781
Other, net					(224)	98
Net cash provided (used) by investing activities					1,202	1,264
Cash flows from financing activities:
Purchases of treasury stock					(2,729)	(2,050)
Proceeds from borrowings					1,039	823
Principal payments under debt obligations					(84)	(194)
Dividends paid to shareholders					(906)	(820)
Change in investment-type contracts, net					(198)	(162)
Treasury stock reissued					5	21
Other, net					(12)	(20)
Net cash provided (used) by financing activities					(2,885)	(2,402)
Effect of exchange rate changes on cash and cash equivalents					(18)	70
Net change in cash and cash equivalents					539	1,306
Cash and cash equivalents, beginning of period		$ 6,229		$ 4,306	6,229	4,306	4,306
Cash and cash equivalents, end of period	$ 6,768		$ 5,612		6,768	5,612	$ 6,229
Supplemental disclosures of cash flow information:
Income taxes paid					602	805
Interest paid					133	127
Noncash interest					25	21
Noncash real estate acquired in satisfaction of debt					247	380
Noncash financing activities:
Lease obligations					25	25
Associate stock bonus
Treasury stock issued for:
Treasury stock issued					17	15
Shareholder dividend reinvestment
Treasury stock issued for:
Treasury stock issued					33	31
Share-based compensation grants
Treasury stock issued for:
Treasury stock issued					$ 7	$ 6